This circuit was obtained from an Electronics Design of 1964. The circuit makes use of tunnel diodes that are uncommon today. The circuit works with very weak signals.
This circuit for light data transmission (visible or IR) has a maximum speed of 1 Mbps and can be...
A complete test for opto-couplers can be made using the circuit Bellow. The function generator...
This 3-digit digital gauge was found in the July 1900 issue of Radio Electronics magazine. The...